We now have an official response to what happened and what is being done about the Founder's Pack dupe, where players were able to receive benefits from multiple packs. It seems no Royal Crystals were received after all and the other benefits will be removed soon as well.
Founder's Packs (Source)
Yesterday, a database timeout led to multiple claims of Founder’s Packs and Twitch Drops for some players. This affected less than 4% of all accounts, with the majority of these players only redeeming 1-2 extra items, which did not include any additional Royal Crystals. We worked quickly to deploy a fix that has prevented additional items from being created, and are currently working with Smilegate RPG to revoke the items that were created during the period that this occurred. We expect this fix to come later today, as it is a priority for the team to keep the in-game economy intact.
Thank you for your patience, and we will provide an update as soon as possible.
Source: News Latest Topics https://www.icy-veins.com/forums/topic/64156-official-lost-ark-founders-pack-dupe-response-and-removal-plan/